[Z06] im confused
Thread Starter
Heel & Toe
Joined: Aug 2009
Posts: 17
Likes: 0
From: Fayetteville NC
im confused
Ok I'm lost ,I've found more than one article stating that the 03 zo6 actually puts 425 to the crank even though it stats 405 has anyone else seen this even on a gm forum it was posted
Safety Car
Joined: Mar 2006
Posts: 3,538
Likes: 9
From: Pasadena, CA
Let say a bone stock 03 z06 dyno's 360rwhp which is very well possible. If you take 360 divided by .85(drive train loss) you'll get 423. It's safe to say the LS6 might be a tad underrated, but to put an exact number on it is pretty tough.
Last edited by 03 Z-oh-6; Sep 8, 2009 at 11:24 AM.
Racer
Joined: Oct 2008
Posts: 483
Likes: 4
From: Cincinnati OH
There is usually always some conservatism added to the factory numbers. This is sometimes done to avoid scrutiny if it doesnt make those numbers (think of when the rx-8 came out, and they then had to come back later and say they were wrong about the power, and downgrade it) as well as emissions/ gov't regulations, etc...
Furthermore trying to back calculate an estimated drivetrain loss is often silly, and unless substantiated, is worthless.
But most of all, it doesnt matter. The power to the wheels is all that really matters, not what the crank sees. So if you want to know how much power you have, strap it to a dyno and talk about your Wheel hp.
Furthermore trying to back calculate an estimated drivetrain loss is often silly, and unless substantiated, is worthless.
But most of all, it doesnt matter. The power to the wheels is all that really matters, not what the crank sees. So if you want to know how much power you have, strap it to a dyno and talk about your Wheel hp.
Advanced
Joined: Feb 2007
Posts: 52
Likes: 0
From: San Jose California
I believe the horsepower ratings these days are with all the accessories attached. (Alternator, etc.) So if you were to run a stock LS6 (405 hp) on an engine dyno sans accessories, it seems likely it would put out about 425.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
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Racer
Joined: Oct 2008
Posts: 483
Likes: 4
From: Cincinnati OH
based off some random "guess" at drivetrain loss? Some random guess that someone said in a thread somewhere, and it spread around so people just use it, not knowing if it is factual or not?
Only kids and salesmen talk about crank hp, people who drive, or make power, talk about wheel hp, or timeslips
Only kids and salesmen talk about crank hp, people who drive, or make power, talk about wheel hp, or timeslips
Moderator
Joined: Jun 2004
Posts: 22,624
Likes: 939
based off some random "guess" at drivetrain loss? Some random guess that someone said in a thread somewhere, and it spread around so people just use it, not knowing if it is factual or not?
Only kids and salesmen talk about crank hp, people who drive, or make power, talk about wheel hp, or timeslips
Only kids and salesmen talk about crank hp, people who drive, or make power, talk about wheel hp, or timeslips
Racer
Joined: Oct 2008
Posts: 483
Likes: 4
From: Cincinnati OH
I am a firm believer in not just believing what I read on the internet, especially just a public forum. For example, if you read on this forum, a lot of people will try to tell you the 01 zo6 wheels were the lightest
Or that they are made out of magnesium 
Or in another thread I replied to this week, that an A/F ratio of 12.6 on an n/a car is lean 
Burning Brakes
Joined: Jun 2004
Posts: 1,184
Likes: 3
From: KADS- If it has wings or an engine, I can break it. Dallas TX
The power should be as rated. These tests are now conducted per SAE standards. Because some used to take off belts and other such crap. All manufactuers use the same standards.
